AW3225QF, TV Led Dolby Vision not working/supported

Make sure it's not set to off in the OSD menu.

Page 60 of the manual

@Vanadiel​ Dolby Vision is enabled on my monitor and the flag comes up when playing LLDV content, but as I said, there is no TV-led (true Dolby Vision) option in the monitor's EDID.

As reported by EDID Decode:

Vendor-Specific Video Data Block (Dolby), OUI 00-D0-46:
    Version: 2 (12 bytes)
    Supports YUV422 12 bit
    DM Version: 5.x
    Backlt Min Luma: 75 cd/m^2
    Interface: Low-Latency + Low-Latency-HDMI
    Supports 10b 12b 444: 12 bit
    Target Min PQ v2: 0 (0.00000000 cd/m^2)
    Target Max PQ v2: 2770 (518 cd/m^2)
    Unique Rx, Ry: 0.68750000, 0.30468750
    Unique Gx, Gy: 0.23828125, 0.71484375
    Unique Bx, By: 0.14453125, 0.05468750
  YCbCr 4:2:0 Capability Map Data Block:
    VIC 118:  3840x2160  120.000000 Hz  16:9    270.000 kHz   1188.000000 MHz
    VIC  97:  3840x2160   60.000000 Hz  16:9    135.000 kHz    594.000000 MHz
    VIC  96:  3840x2160   50.000000 Hz  16:9    112.500 kHz    594.000000 MHz

As you can see under "Interface", only Low-Latency and Low-Latency-HDMI are offered by the monitor to connected devices. A true Dolby Vision display would have "Interface: Standard + Low-Latency + Low-Latency-HDMI"

This significantly limits the functionality of the AW3225QF as a movie monitor. And if there is a DV decoder inside the model itself, then it is a waste not to support it.

Considering this is a gaming monitor I highly doubt you will see a change in this.